* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-color: #dee2e6;
    --bg-color: #f5f6fa;
    --sidebar-width: 260px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: #333;
}

.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-item {
    display: block;
    padding: 0.9rem 1.5rem;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-left-color: white;
}

.nav-item.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-left-color: white;
}

.nav-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 1rem 0;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.content-header h1 {
    font-size: 1.8rem;
    color: var(--dark-color);
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: #5a6fd6;
}

.btn-secondary {
    background: var(--light-color);
    color: var(--dark-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #e2e6ea;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.flash-messages {
    margin-bottom: 1rem;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.dashboard {
    max-width: 1400px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    display: flex;
    gap: 1rem;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.stat-icon {
    font-size: 2.5rem;
}

.stat-info h3 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: #6c757d;
    font-size: 0.9rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.dashboard-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.dashboard-card h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.admin-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--light-color);
    font-weight: 600;
    color: var(--dark-color);
    font-size: 0.9rem;
}

.data-table tr:hover {
    background: #f8f9fa;
}

.data-table a {
    color: var(--primary-color);
    text-decoration: none;
}

.data-table a:hover {
    text-decoration: underline;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

.badge-secondary {
    background: #e2e6ea;
    color: #6c757d;
}

.quick-actions {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.quick-actions h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    background: var(--light-color);
    border-radius: 8px;
    text-decoration: none;
    color: var(--dark-color);
    transition: all 0.3s;
}

.action-btn:hover {
    background: var(--primary-color);
    color: white;
}

.action-icon {
    font-size: 2rem;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.page-link {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--dark-color);
    text-decoration: none;
    transition: all 0.3s;
}

.page-link:hover {
    background: var(--light-color);
}

.page-link.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.form-container {
    max-width: 800px;
}

.admin-form {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.form-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.form-section:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.form-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-color);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="password"],
.form-group input[type="datetime-local"],
.form-group input[type="color"],
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: #6c757d;
    font-size: 0.85rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.tag-icon-preview {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    font-size: 1rem;
}

.color-preview {
    display: inline-block;
    width: 20px;
    height: 20px;
    border-radius: 4px;
    vertical-align: middle;
    margin-right: 0.5rem;
}

.text-muted {
    color: #6c757d;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.login-container {
    background: white;
    padding: 3rem;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 1.8rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.login-header p {
    color: #6c757d;
}

.login-form .form-group {
    margin-bottom: 1.5rem;
}

.login-form input {
    width: 100%;
    padding: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-login {
    width: 100%;
    padding: 0.9rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-login:hover {
    background: #5a6fd6;
}

.login-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: #6c757d;
    font-size: 0.9rem;
}

.login-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.login-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
    }

    .main-content {
        margin-left: 0;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}